The high-resolution phase-sensitive excitation-profile of a shaped pulse can be measured with the pulsed-filed-gradient technique in one or several experiments by spinecho or gradient-echo sequence. The key to the implementation of this rapid measurement is the determination of the exact echo time (TE). However due to the imperfection of the field-gradient, the exact TE is difficult to determine experimentally. Any discrepancy between the ideal TE and an experimental TE will introduce the extra phase shift to...

The high-resolution phase-sensitive excitation-profile of a shaped pulse can be measured with the pulsed-filed-gradient technique in one or several experiments by spinecho or gradient-echo sequence. The key to the implementation of this rapid measurement is the determination of the exact echo time (TE). However due to the imperfection of the field-gradient, the exact TE is difficult to determine experimentally. Any discrepancy between the ideal TE and an experimental TE will introduce the extra phase shift to the excitation profile. Experimental details are disussed in this article and a phase precompensation method is adopted to avoid the experimental error.